The animal makes a lurch to keep from falling, contracts the muscles, and the patella slips into place with a sharp click, and the animal walks off as if nothing had happened.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
The principal muscle in the thigh is the great muscle running down the front of the thigh, and fastening to the upper border of the patella, or knee cap.
"A Handbook of Health"
Woods Hutchinson
A nurse was telling me a story that had been told her: the doctors heard a great scream, went out to see what had happened; an old woman had fallen and dislocated her patella; she would not allow any one to touch her, and they sent off for a funny old woman whom they looked upon as a witch.
"My Diary in Serbia: April 1, 1915-Nov. 1, 1915"
Monica M. Stanley